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2003 Subaru Legacy CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Subaru REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Subaru Legacy car and truck
repair procedures including Subaru engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Subaru Legacy automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Subaru -> Electric Cooling Fans -> Component Replacement -> Condenser & Radiator Fan Motors
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
Condenser & Radiator Fan Motors
- Remove condenser and radiator cooling fan motors as outlined in "Radiator, Replace" in the "Component Replacement & Adjust... "
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BRAKE SERVICE PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Subaru -> Disc Brakes -> Caliper Service -> Baja, Legacy & Outback -> Forester & Impreza -> Front -> Overhaul -> Rear -> Replacement
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
Replacement
Front
- Raise and support vehicle.
- Remove front wheels.
- Disconnect brake hose from caliper. Plug hose to prevent fluid leakage.
- Remove caliper lockpin, rotate caliper on guide pin, then remove caliper, Figs. through .
- Reverse procedure to install noting the following:
- Refer toFigs. through for tightening values.
- After completing installation, bleed hydraulic system as outlined under .
Rear
- Raise and support vehicle.
- Remove rear wheels.
- Disconnect brake hose from caliper. Plug brake to prevent fluid leakage.
- Remove caliper retaining bolts and the caliper, Figs. and .
- Reverse proc...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Subaru -> Fuel Filter Replacement -> Except Justy w/Carbureted Engine -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
Fuel System Pressure Relief
- On Impreza, SVX, 1990-94 Legacy models,fold down the rear seat back, then remove the floor mat and access hole lid.
- On 1995-00 Legacy models, remove the rear seat cushion and seat back, then the floor mat and access hole lid.
- On all models, disconnect the fuel pump relay electrical connector.
- Start the engine and operate until it stalls.
- After the engine has stalled, crank the engine for at least 5 seconds.
- Place the ignition switch in Off position.
- Disconnect the battery ground cable.
- Connect the fuel pump electrical connector.
- On...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
CV AXLE SHAFT, Replace -> Front -> Rear
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
Front
- Disconnect battery ground cable.
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and front wheels.
- Unstake hub nut using suitable tool.
- Remove driveshaft locknut from front hub while depressing brake pedal. Remove wheel before loosening axle nut.
- Remove stabilizer link from front arm.
- Disconnect transverse link from housing.
- Remove spring pin which secures transmission spindle and install new spring upon installation.
- Remove front driveshaft assembly. If driveshaft is hard to remove use suitable puller to aid in removal.
- Remo...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Starter, Replace
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
- Disconnect battery ground cable.
- Disconnect solenoid wiring at starter.
- Remo...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Cabin Air Filter Service -> Subaru -> 1998-2004 Legacy, Outback & 2003-04 Baja
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
The cabin air filter should be replaced every 12 months or 9,300 ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Subaru -> Rear Differential Oil Temperature Indicator Lamp ->
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
The Rear Differential Oil temperature lamp will turn on when ignition switch is placed in On position and should turn off after a few seconds. If lamp illuminates while driving, the vehicle should be pulled off the r...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
Inlet
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at heater core.
- Remove hose from heater core.
- Reposition hose clamp at cylinder head.
- Remove hose from cylinder head.
- Remove hose from vehicle.
- Reverse procedur...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Subaru Legacy AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Subaru Legacy 2.5 H4 GAS
- Remove drive belt cover. Wipe off any oil or water on belt and pulley.
- Loosen lockbolt on slider bolt.
- Loosen slider bolt.
- ...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Subaru Legacy AUTOMOBILES
Component location diagrams for most 2003 Subaru Legacy cars and light trucks sold in the U.S. from 1990+.
 Solenoids Diagram for 2003 Subaru Legacy 2.5 H4 GASComponents on diagram: |
 Rear Wiring Harness Diagram for 2003 Subaru Legacy 2.5 H4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Subaru Legacy AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Subaru Legacy cars and light trucks sold in the U.S.
 2003 Subaru Legacy 2.5 H4 GAS Wiring DiagramComponents on diagram: |
 2003 Subaru Legacy 2.5 H4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Subaru Legacy AUTOMOBILES
OEM TSB listings for most 2003 Subaru Legacy cars and light trucks sold in the U.S. from 1985+.
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Document: Service Manual Corrections Vehicle: 2003 Subaru Legacy 2.5 H4 GAS Auto Systems: |
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Document: EVAPORATIVE EMISSION SYSTEM DIAGNOSTIC
INFORMATION Vehicle: 2003 Subaru Legacy 2.5 H4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Subaru Legacy AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Subaru Legacy cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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